Datasheet

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Program Description
3.4.7 Handset Section
Similar to the headset section, the handset section is used mainly to configure the handset input gain
through the handset PGA or the AGC, selectable by the Handset Input AGC ON checkbox.
By default, when the handset AGC is OFF, and the programmable gain amplifier (PGA) is selected for the
input gain control, allowing analog input gain control from 0 dB to 59.5 dB. When the AGC is off, moving
the volume slide on the AGC OFF subsection adjusts the PGA on the MICIN_HND path. Checking the
Mute box mutes the handset input signal.
The handset and headset share the soft-stepping settings. Refer to the explanation in the Headset Section
for the feature and settings.
Similar to the headset, when the box by AGC ON is checked, the handset AGC is enabled.
In addition to the handset input-gain control, the handset microphone bias can be selected in the Handset
Section, similar to that in the Headset Section.
3.4.8 Cell-Phone Section
The Cell-Phone section is used to configure the cell-phone input gain, by using the CP_IN PGA or AGC.
When the checkbox by Cell Phone Input AGC ON, is not checked, the PGA controls the gain, from –34.5
dB to 12 dB, and in 0.5 dB steps if the soft-stepping option is selected. The cell-phone input is muted
when the Mute box under the slider is checked.
When the box by AGC ON is checked, the cell-phone input AGC is enabled. Refer to the TSC2111 data
sheet or the appropriate application report(s) for setting and using the AGC.
At the TSC2111, both CP_IN and CP_OUT signals can be at single-ended or differential mode. The
corresponding software settings can be found in this section.
3.4.9 Sidetone Section
The TSC2111 has an analog sidetone circuit. The audio outputs of the TSC2111 includes a mixer so that
the sidetone can be mixed with the audio output signals, in proportion to their respective volume settings.
The sidetone is enabled when the PowerUp box is checked. Its volume can be adjusted by the analog
volume control slider, ranging from –34.5 dB to12 dB, and in 0.5-dB steps if the soft-stepping option is
used. The sidetone is muted when the Mute box under the slider is checked.
At the EVM power up, the sidetone is defaulted to power up.
3.4.10 Keyclick Section
When the Enable Key Click box is checked, a clicking sound is heard whenever an audio-related setting is
selected or checked in the Audio 1, Audio 2 and the Audio Effects Filters screens.
The volume, frequency, and duration (length) of this keyclick can be adjusted using the corresponding
slider and selectors.
At the EVM power up, the keyclick is enabled by default.
3.4.11 Buzz Input Section
The buzzer input from the cell phone can be routed to the TSC2111 through the BUZZ_IN pin, if the
checkbox by PowerDown is not selected. This input path supports the PGA range of from –45 dB to 0 dB,
in 3 dB steps if the soft-stepping option was chosen.
SLAU178 – April 2006 TSC2111EVM and TSC2111EVM-PDK 21
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